Very interesting idea and mechanics, I'm bad at these types of game for sure!
A real cool game idk if the shield card works or not?? Cause I felt like it worked more on the enemy than on myself.
Overall it's a nice polished game already well done!
The guards and goblins have an attack that can go through block, but the UI isn't setup in a way that makes it easy to notice. I'll be improving the tutorial as soon as I can. Thanks for the feedback!